Mario Draghi, president of the European Central Bank (ECB), center, Vitor Constancio, vice president of the European Central Bank (ECB), left, and Christine Claire Graeff, director general for communications at the European Central Bank (ECB), arrive at a news conference to announce the bank's interest rate decision, at the ECB headquarters in Frankfurt, Germany, on Thursday, July 16, 2015. The ECB granted more emergency liquidity assistance for Greek banks after the country's parliament agreed reform measures and euro-area nations approved short-term funding, Draghi said. Photographer: Martin Leissl/Bloomberg via Getty Images

Mario Draghi, president of the European Central Bank (ECB), center, Vitor Constancio, vice president of the European Central Bank (ECB), left, and Christine Claire Graeff, director general for communications at the European Central Bank (ECB), arrive at a news conference to announce the bank's interest rate decision, at the ECB headquarters in Frankfurt, Germany, on Thursday, July 16, 2015. The ECB granted more emergency liquidity assistance for Greek banks after the country's parliament agreed reform measures and euro-area nations approved short-term funding, Draghi said. Photographer: Martin Leissl/Bloomberg via Getty Images